| 生物滤池A/O工艺处理焦化废水研究 |
| 摘要点击 2888 全文点击 1531 投稿时间：2006-12-28 修订日期：2007-03-02 |
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| 中文关键词 生物滤池 A/O系统 固定化 焦化废水 |
| 英文关键词 biological filter A/O system immobilization coking wastewater |
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| 中文摘要 |
| 采用具有特定载体的生物滤池A/O工艺处理焦化废水.废水含有高浓度酚类化合物，COD和NH+4-Ｎ分别约2?000 mg/L和260 mg/L.在HRT为60 h时，COD和NH+4-Ｎ平均去除率分别达到了87.0%和91.6%，最佳条件下出水NH+4-Ｎ浓度达到了国家一级排放标准.生物滤池A/O工艺高效去除了原水中小分子质量的酚类化合物，出水中有机物主要分布于10?000～30?000相对分子质量范围，且含有—OH、CO、C—O等官能团和苯环结构.由于载体的支持和保护作用，大量微生物固定于载体的表面和内部，实现了COD、NH+4-Ｎ和TN的同时去除.生物滤池A/O系统具有运行稳定、抗冲击等优点. |
| 英文摘要 |
| Coking wastewater was treated by A/O process of biological filter with a special kind of carrier. The wastewater contained much more phenolic compounds with about 2?000 mg/L of COD and 260 mg/L of NH+4-Ｎ. The A/O system could achieve average removal efficiencies of 87.0% and 91.6% for COD and NH+4-Ｎ, respectively, when HRT was 60 h. The NH+4-Ｎ in the effluent could meet the first level of National Discharge Standard at optimal operation condition. The phenolic compounds with low molecular weight could be fully biodegraded by A/O system. The organic compounds in the effluent were in the relative molecular weight range of 10?000～30?000 and contained —OH, CO, C—O and phenyl group. Based on the support and protection of the carrier, a great number of microorganisms adhered and immobilized on the outer and inner surface of carrier, which contributed to a simultaneous removal of COD, NH+4-Ｎ and TN. The A/O system biological filter showed a characteristic of steady performance and resistance ability during the operation period. |
